Try out some of these ideas for dessert.
Put a small scoop of ice cream or frozen yogurt in a bowl and top it with lots of fresh or frozen fruit.
Or why not mix your favourite yoghurt with some berries and use a ice lolly mould to make your own ice-cream like lollies?
You can also use those moulds for making fresh fruit juice ice lollies too! (You could even try throwing in some chunk of fresh fruit before you put them in the freezer to set!)
My kids are also fans of jelly, so we pick a flavour of sugar free jelly crystals and then pour it into individual sized tupperware tubs and add some chunks of pineapple or a few grapes or strawberries before we put them in the fridge.
On the subject of grapes, that reminds me - frozen grapes actually make quite a pleasant pudding! You can even get candy floss flavour grapes - if you can find them!
It's all about experimenting and having fun with fruit!